MERCEDES GP: Q&A with Ross Brawn

What is your summary of the week in Jerez?The second pre-season test in Jerez was extremely useful. Our priorities at this stage are improving the reliability of the new car, working with the KERS system, and developing our understanding of the Pirelli tyres. We had good reliability for the middle two days which allowed us to accumulate mileage and collect a lot of data to study ahead of the next